Carbureting apparatus



March 9 1926. 1,575,830

J. P. HEUCHEL CARBURETING APPARATUS Filed May 4, 1923 2; vew fa 1':

Patented Mar. 9, 1926.

UNITED STATES JEAN PIERRE HEUCHEL, OF ROUEN, FRANCE.

GARBURETING APPARATUS.

Application filed May 4,

To all whom it may concern:

Be it known that I, JEAN PIERRE HEU- CHEL, a citizen of the Republic of France, residing at Rouen, France, have invented certain new and useful Improvements in Carbureting Apparatus, of which the following is a specification.

My invention relates to an improved carbureting apparatus in which, contrary to the known methods, the air inlet is situated between the source of liquid fuel and the engine. In such an arrangement, there will be produced a zone of depression, the degree of depression and the distance of such zone from the liquid spray being variable and depending directly upon the section of the air inlet and the speed of the engine.

This withdrawal on the reaction principle will cause air and fuel to be drawn in, whereof the proportions will Vary in like manner, and this will provide for a fuel mixture whose composition is constant for all speeds and all amounts of fuel admitted.

The appended drawings, which are given by way of example, illustrate an apparatus in which the carburetor properzis arranged both vertically and horizontally.

Figs. 1 and 2 relate to the vertical apparatus and show sections of the same on the lines I-I and IIII.

Fig. 3 is a front View of one of the flanges of the barrel.

Fig. 4 relates to the horizontal apparatus and is a sectional View of the same.

I Fig. 5 is a section of the latter apparatus on the line VV.

Referring to Figs. 1 and 2, 1 designates the float feed chamber which is closed at the top by a cover 2 serving as the base of the carburetor proper. A. tube 3 is screwed into an aperture in the centre of the said cover and is submerged to the proper level in the said chamber, said tube being coaxial with and serving to guide the float 30. Into the top of the tube 3 is screwed a smaller tube 36 forming a sprayer. The radial ducts formed through the sprayer tube open into the space 41 which has a tapered, conical or like shape, and they connect the bore of the sprayer with a mixing chamber a provided at the lower part of the body of the carburetor. r

The apertures 32 formed in the top of the main tube 3 are connected with the atmosphere by the air inlet ports 5 and ensure the initial supply of air, producing an emul- 1923. Serial No. 636,677.

4.3, the latter being pressed against the body by the spring l which is interposed between the said flange and a nut 45 secured to the end of the axle of the said barrel.

The barrel is rotated by the handle 17 and has three apertures 15 whereof two are adapted to co-operate directly with the conduits 7 while the third, which is of large size, connects the interiorof the barrel with the upper part of the body through which thefuelmixture proceeds to the engine.

Apertures 12 Fig. 1) are formed in the walls of the carburetor body just above the partition 34; they cooperate with apertures 46 formedin the flanges 4-2, 43 which are adapted to be brought into and out of registration therewith during the rotation of said flanges, the arrangement being such that registration takes placeat the same time that the apertures 15 coincide with the conduits 7. .The sprayer tube 36 extends. upwardly to a point somewhat below the barrel 13, and the liquid fuel which rises in the said tube when the engine is running at reduced speeds is enabled to enter the barrel through the aperture 47 in said barrel which is so arranged that the conduits 7 are closed when this takes place as may be readily observed.

The operation is as follow:

W' hen the engine is started, the conduits 7 andaperturcs are closed, and the sprayer tube 36 is open by'means of the aperture 42", so that the engine can withdraw through the said tube the gasolinecontained in the said float chamber, and (through the ducts 4-.0) the air admitted by. the apertures 32 and the inlets To proceed to the normal operation of the engine, it is simply necessary to turn the barrel by means of the handle 17, thus closing the tube 36 and opening the conduits 7; the gasoline will then be drawn through the ducts 40 into the mixing chamber 4: where it meets the-air admitted through the lower ducts 32, formaugmented,- so that the proportion of fueland air remains constant, thus insuring the maximum etliciency for all degrees of admission.

in the i'nodilication shown in Fig. l, the same characteristics are observed. But the tube 8 has at the lower part a calibrated orifice 4'8 situated a few centimetres above the bottom of the chamber 1; the said tube is also directly connected at the upper part 'with the conical space 41, with which latter the apertures 32 also communicate. The sprayer tube 8.6 still enters the main tube 3 but is not screwed thereto, being on the contrary surrounded by an annular passage; in this case it is secured to the annular partition 3i and is directly connected with the chamber l through the radial ducts 87.

Above the partition 34 the main or body part 11 has its axis horizontal and is arranged so as to contain the barrel 1 3 which is closed at one end and open at the other. The said barrel is held by a milled nut 4L9 and has an extension 50 which is secured to the control handle 17. As before, the walls of the barrel are provided with the apertures 15 co-operating with the conduits 7 the aperture a7 is also employed and serves the same purpose as before, and the apertures 14 co-operating with the apertures 12 provided in the body 11 and serving as the main air inlets.

In the embodiment shown in Fig. 4 there is also disposed in front of the orifices 12 a tapered member 35 for concentrating the mixture at the middle part of the barrel.

The operation of this modified form is similar to the preceding. Then running at slow speed, the gasoline rises through the tube 36 and enters the barrel, meeting with admitted air at the level of the ducts 37. In normal operation, the said tube is closed and the gasoline passes directly from the main-tube 3 through the conical space ll into the mixing chamber l and thence through the conduits 7 into the barrel 13, and proceeds from this point to the engine; during its passage, it meets with the successive air inlets 5, 33 and 12 so as to form an emulsion which becomes weaker in fuel as it approaches the outlet of the carbureting apparatus.

Obviouslyuthe said inventionis susceptible of modifications in detail without departing from its spirit, and in particular, the arrangement of the'barrel in the body of the apparatus, which is here illustrated by way of example, can be carried out in any suitable manner. Further, a horizontal carbureting apparatus may be used which comprises a gasoline feed analogous to the one described for the vertical apparatus and vice versa.

I claim:

1. In a carburetor, the combination of a float feed chamber; a casing or body mounted thereon and providing a mixing chainher and air inlets opening into the same; a main fuel tube fitting at its upper end in the casing immediately below the mixing chamber and projecting at its lower por tion into the fuel in the float chamber, said tube having an enlarged mouth at the upper end of its bore; a sprayer tube having its lower portion projecting into the main tube and also having an enlargement which is disposed in said mouth but spaced from the wall thereof to form an intermediate an nular fuel passage of large diameter communicating at its lower end with the bore of the main tube and opening at its upper end into the mixing chamber; a partition in said casing forming thetop wall of the mixing chamber and provided with conduits opening thereinto; a throttle valve mounted in the casing immediately above said partition and having an aperture individual to each conduit and adapted to be brought into and out of registration therewith, and another aperture adapted to be brought into and out of registration withthe end of the bore of the sprayer tube; and means for operating said throttle valve.

2. In a carburetor, the combination of a float feed chamber; a casing or body mounted thereon and providing a mixing chamber and air inlets opening into the same; a main fuel tube fitting at its upper end in the casing immediately below the mixing chamber and'projecting at its lower portion into the fuel in the float chamber, said tube having an enlarged, inverted conical mouth at the upper end of its bore; a sprayer tube having its lower portion projecting into the main tube and also luv-- ing an enlargement of inverted conical shape which is disposed in said mouth but spaced from the wall thereof to form a tapered, annular fuel passage of large diameter communicating at its lower end with the bore of the main tube and opening at its upper end into the mixing chamber; a partition in said casing forming the top wall of the mixing chamber and provided with conduits opening thereinto; a throttle valve mounted in the. casing immediately above said partition and'having an aperture individual to each conduit and adapted to he brought into and outof registration illt) l'lil therewith, and another aperture adapted to be brought into and out of registration with the end of the bore of the sprayer tube; and means for operating said valve.

3. A carburetor, according to claim 1, in which the air inlets are formed laterally in the side wall of the mixing chamber at a point immediately above the enlargement of the sprayer tube; and in which said wall is formed with lower air inlets that communicate with the lower portion of the annular fuel passage.

4. A carburetor, according to claim 1, in which the side wall of the mixing chamher is formed with air inlets that communicate with the lower portion of the annular fuel passage, and with other air inlets that open laterally into said chamber at a point immediately above the enlargement of the sprayer tube; and in which said sprayer tube is formed with radial ducts that open at their inner ends into its bore and are in communication at their outer ends with the interior of the mixing chamber.

tu re.

JEAN PIERRE I-IEUCHEL.

In testimony whereof I affix my signa- 25 

